package com.ding.coolweather2.db;

import android.content.Context;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;

/**
 * Created by dingsheng on 2016/6/5.
 */
public class CoolWeatherOpenHelper extends SQLiteOpenHelper {

    //province表建表语句
    public static final String CREATE_PROVINCE="create table Province("
            + "id integer primary key autoincrement, "
            + "province_name text, "
            + "province_code text)";
    //City表建表语句
    public static final String CREATE_CITY="create table City("
            + "id integer primary key autoincrement,"
            + "city_name text, "
            + "city_code text, "
            + "province_id integer)";
    //County表建表语句
    public static final String CREATE_COUNTY="create table County("
            + "id integer primary key autoincrement, "
            + "county_name text, "
            + "county_code text, "
            + "city_id integer)";

    public CoolWeatherOpenHelper(Context context, String name,SQLiteDatabase.CursorFactory factory,
                                 int version) {
        super(context, name, factory, version);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {

        db.execSQL(CREATE_PROVINCE);//创建Province表
        db.execSQL(CREATE_CITY);//创建City表
        db.execSQL(CREATE_COUNTY);//创建County表
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

       // db.execSQL("drop table if exists Province");
      //  db.execSQL("drop table if exists City");
       // db.execSQL("drop table if exists County");
       // onCreate(db);

    }
}
